DCS High Data Rate

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DCS High Data Rate
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What is DCS High Data Rate ?Introduction

• Transition from 100 bps to 300 bps and 1200 bps
• A Cooperative Effort
• Demodulators being developed by NOAA/NESDIS
• DCPs (Modulators) being developed by
  Manufacturers
• Current DCPs are 100 bps synchronous, Biphase
• New HDR Service 300/1200 bps asynchronous, Octal
  Phase

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DCS High Data Rate Project History Demodulators

• DCS STIWG Funds High Data Rate Study 1989
• Cyberlink Performs Study and Sets Design and
  Performance Specifications 1990
• DCS STIWG and NOAA/NESDIS Funds Committed for
  High Data Rate Demodulator Development 1993
• Based on Competitive Procurement NOAA Awards
  Demodulator Development Contract to Vitel Corp.
  1995

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DCS High Data Rate ProjectHistory Demodulators

• Phase I (Prototype) Proof of
  Concept/Engineering Model Development
• Operational Units
• Develop and Build 7x300 bps Demodulators
• Develop and Build 4x1200 bps Demodulators
• Develop and build 2 High Data Rate Test
  Transmitters
• Develop and build 2 High Data Rate DCP
  Certification Test Sets

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DCS High Data Rate ProjectHistory Demodulators

• Phase 2. Build 23x300 bps, and 6x1200 bps
  additional Demodulators
• Recent DSP Design Improvements Allow Either
  300/1200 mode
• Phase 2 Demods Currently Undergoing Installation
  at the Wallops Data Reception Site
• Certification Test Sets Supplied to Manufacturers
  as DCP Development Aid
• NOAA Certification Officer Witnesses
  Manufacturers Test for Formal DCP Certification
  Approval

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DCS High Data Rate ProjectHistory Demodulators

• DCS Demodulator Functions Demodulate Signal,
  Error Checking, Decoding.
• 300 bps Synchronous (like the current 100 bps),
  1200 bps Asynchronous, Both are Octal (8) Phase
  (Technically 8PSK)

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DCS High Data Rate ProjectCurrent Status

• Phase 1 Demods Installed at Wallops and
  Operational
• Phase 2 Demods Undergoing Installation at Wallops
• Phase 2 Demods have Improved Performance due to
  DSP Module Addition.
• NOAA Certifying New HDR DCPs as Manufacturers are
  Ready for Certification Tests
• DCS Users Routinely Transmitting both 300 and
  1200 bps Data
• GPS Recommended for all HDR